The doctor I went to with my son didn't check at all because of increase in infection. I switched doctors and they start them at 36 weeks. They also said something about checking for strep down there. Does your doctor do that?
Without complications (contractions or leaking) my doctor won't do a cervical check until 38 weeks. She doesn't want to start premature labor. Today I'm having my first check and I have been thinking of refusing. They are uncomfortable and don't tell you how close to labor you really are.
I'm 37 wks and 2cm dilated and 80% effaced